The Primary Arms 3x Compact Scope is ideal for tactical or sport shooting when you need a single, lightweight scope to do it all! It features Primary Arm's patented ACSS® CQB M2 reticle, providing quick ranging, wind holds and moving target leads. The ACSS reticle can be used with 5.56 NATO, 7.62 NATO/.308 Win, and 5.45x39 calibers. The 3x Compact Scope is very fast from 0 to 300 yards, and very accurate from 400 to 600 yards. The etched reticle requires no illumination, but 12 brightness settings are powered by an included CR2032 battery. The scope is extremely durable, designed to handle heavy recoil and extreme weather conditions, with a 3-year warranty. The standard 1913 Picatinny mount can be removed for use on AR-15 carry handles with carry handle screw (not included) and ACOG mounts.